CN204575835U - A kind of power utility check tester - Google Patents
A kind of power utility check tester Download PDFInfo
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- CN204575835U CN204575835U CN201520018238.7U CN201520018238U CN204575835U CN 204575835 U CN204575835 U CN 204575835U CN 201520018238 U CN201520018238 U CN 201520018238U CN 204575835 U CN204575835 U CN 204575835U
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Abstract
The utility model provides a kind of power utility check tester, it comprises main frame for showing tail voltage current phase waveform acquisition and the wireless sampling thief for PT mutual inductor or CT mutual inductor secondary side voltage current phase waveform acquisition, described main frame comprises main frame MCU, main wireless synchronization module and first from wireless synchronization module, and described wireless sampling thief comprises wireless sampling thief MCU and second from wireless synchronization module; Described in described main wireless synchronization model calling, main frame MCU is to produce synchronizing signal; Described first receives described synchronizing signal from wireless synchronization module and is sent to described main frame MCU; Described second receives described synchronizing signal from wireless synchronization module and is sent to described wireless sampling thief MCU; Described wireless sampling thief MCU analyzes described synchronizing signal and analysis result is sent to described main frame MCU; Described main frame MCU analyzes described synchronizing signal, obtains in-phase signal when the amplitude-phase of two analysis results is identical.
Description
Technical field
The utility model relates to high for directional error field tests, specifically, relate to a kind of power utility check tester.
Background technology
Carrying out in the process of site error test to massive quantity power supply and measurement and height for low meter measuring apparatus, due to measurement meter distance CT mutual inductor and PT mutual inductor far away, the reference often cannot carrying out the table tail wiring verifying measurement meter is separate, and this makes the judgement of his-and-hers watches tail wiring create a lot of uncertainties.To obtain signal from PT mutual inductor or CT mutual inductor, conventional method uses wired methods.Wired methods due to reasons such as line losses, make to wire rod to choose requirement higher, and winding displacement can bring very large trouble to site operation.
How to address this problem, all there is no good solution in the industry all the time.
Utility model content
The purpose of this utility model is for the deficiencies in the prior art, provides the power utility check tester that a kind of structure is simple, easy to use.
To achieve these goals, the technical scheme that the utility model adopts is: a kind of power utility check tester, it comprises main frame for showing tail voltage current phase waveform acquisition and the wireless sampling thief for PT mutual inductor or CT mutual inductor secondary side voltage current phase waveform acquisition, described main frame comprises main frame MCU, main wireless synchronization module and first from wireless synchronization module, and described wireless sampling thief comprises wireless sampling thief MCU and second from wireless synchronization module;
Described main wireless synchronization module, connects described main frame MCU, in order to produce synchronizing signal;
Described first from wireless synchronization module, receives described synchronizing signal, and is sent to described main frame MCU;
Described second from wireless synchronization module, receives described synchronizing signal, and is sent to described wireless sampling thief MCU;
Described wireless sampling thief MCU, analyzes the first phase that described synchronizing signal obtains the second voltage and current, and analysis result is sent to described main frame MCU by described second from wireless synchronization module;
Described main frame MCU, analyzes the first phase that described synchronizing signal obtains the first voltage and current, the first phase of comparison first voltage and current and the first phase of the second voltage and current, obtains in-phase signal when the two amplitude-phase is identical.
Based on above-mentioned, described main frame MCU and described wireless sampling thief all adopt ADE7878 to measure chip.
The utility model hinge structure has substantive distinguishing features and progress, specifically, the utility model is by arranging main wireless synchronization module and two from wireless synchronization module, solve and to table tail, the problem of sync waveform sampling is carried out to PT mutual inductor or CT mutual inductor, there is the advantage that structure is simple, easy to use.
Accompanying drawing explanation
Fig. 1 is structure block diagram of the present utility model.
Fig. 2 is the sync waveform sampling time sequence figure of the utility model main frame and wireless sampling thief.
Embodiment
Below by embodiment, the technical solution of the utility model is described in further detail.
As shown in Figure 1, a kind of power utility check tester, it comprises main frame for showing tail voltage current phase waveform acquisition and the wireless sampling thief for PT mutual inductor or CT mutual inductor secondary side voltage current phase waveform acquisition, described main frame comprises main frame MCU, main wireless synchronization module and first from wireless synchronization module, and described wireless sampling thief comprises wireless sampling thief MCU and second from wireless synchronization module.
Described main wireless synchronization module, connects described main frame MCU, in order to produce synchronizing signal; Described first from wireless synchronization module, receives described synchronizing signal, and is sent to described main frame MCU; Described second from wireless synchronization module, receives described synchronizing signal, and is sent to described wireless sampling thief MCU; Described wireless sampling thief MCU, analyzes the first phase that described synchronizing signal obtains the second voltage and current, and analysis result is sent to described main frame MCU by described second from wireless synchronization module; Described main frame MCU, analyzes the first phase that described synchronizing signal obtains the first voltage and current, the first phase of comparison first voltage and current and the first phase of the second voltage and current, obtains in-phase signal when the two amplitude-phase is identical.
Based on above-mentioned, described main frame MCU and described wireless sampling thief all adopt ADE7878 to measure chip.
Power utility check tester of the present utility model adopts following strange land wireless synchronization waveform sampling method, and concrete steps flow process is as follows:
Step 1: described main frame MCU produces synchronizing signal by wireless synchronization module main described in IO port controlling;
Step 2: described main wireless synchronization module utilizes the mode of broadcast to be sent to first from wireless synchronization module and second from wireless synchronization module by after described synchronizing signal modulation, the synchronizing signal received is outputted to main frame MCU from wireless synchronization module by described first, and the synchronizing signal received is outputted to wireless sampling thief from wireless synchronization module by described second.
Step 3: described main frame MCU and described wireless sampling thief adopt timer capture pattern to carry out the waveform sampling in N number of tested cycle to the synchronizing signal received respectively.
Step 4: described main frame MCU and described wireless sampling thief carry out Lagrange's interpolation to waveform, Fast Fourier Transform (FFT) respectively, obtains waveform frequency domain characteristic, then obtains the first phase of voltage and current.
Step 5: its analysis result is sent to described main frame MCU by second from wireless synchronization module by described wireless sampling thief, described main frame MCU is to the amplitude-phase combined analysis of two analysis results, obtain the circuit relation of table tail and PT mutual inductor or CT mutual inductor secondary side, obtain in-phase signal when amplitude-phase is identical.
To massive quantity power supply and measurement and high carry out adopting in the process of site error test the utility model method to carry out the table tail wiring verifying measurement meter separate for low meter measuring apparatus time, accessible index: accessible 200 meters of wireless communication distance sighting distance, error criterion: locking phase is measured gap and is less than 0.2 °.
As the sync waveform sampling time sequence figure that Fig. 2 is the utility model main frame and wireless sampling thief, wherein, as shown in FIG.: T1, main wireless synchronization module is to first from the time delay of wireless synchronization module; T2, main wireless synchronization module is to second from the time delay of wireless synchronization module; T3, the time of synchronizing signal first waveform sampling point in main frame MCU; T4, from machine synchronizing signal to the time of ADE first waveform sampling point; S1, the synchronizing signal that main wireless synchronization module receives; S2, the synchronizing signal that main frame MCU receives; First waveform sampling point of S3, main frame MCU; S4, the second synchronizing signal received from wireless synchronization module; First waveform sampling point of S5, wireless sampling thief MCU; A waveform sampling point of Sn, main frame MCU; A waveform sampling point of Sm, wireless sampling thief MCU; The sequential of 125us, ADE chip high speed sampling.
As seen from the figure, the time absolute growth of T1, T2 is little on method of sampling impact, but its time difference is larger to accessible Index Influence.In reality test, in accessible 200 meters of radio communication, the mistiming controls within 0.8us.
The time absolute value of T3, T4 and difference do not affect the method for sampling, but its flutter catch and accurately calculate its value on error criterion impact larger.This power utility check tester flutters by timer the method for catching can calculate the time accurately.Control within error criterion scope by making final wireless synchronization waveform sampling method to the accurate Calculation of T1, T2, T3, T4.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the field have been to be understood that: still can modify to embodiment of the present utility model or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope of the utility model request protection.
Claims (2)
1. a power utility check tester, it is characterized in that: it comprises main frame for showing tail voltage current phase waveform acquisition and the wireless sampling thief for PT mutual inductor or CT mutual inductor secondary side voltage current phase waveform acquisition, described main frame comprises main frame MCU, main wireless synchronization module and first from wireless synchronization module, and described wireless sampling thief comprises wireless sampling thief MCU and second from wireless synchronization module;
Described main wireless synchronization module, connects described main frame MCU, in order to produce synchronizing signal;
Described first from wireless synchronization module, receives described synchronizing signal, and is sent to described main frame MCU;
Described second from wireless synchronization module, receives described synchronizing signal, and is sent to described wireless sampling thief MCU;
Described wireless sampling thief MCU, analyzes the first phase that described synchronizing signal obtains the second voltage and current, and analysis result is sent to described main frame MCU by described second from wireless synchronization module;
Described main frame MCU, analyzes the first phase that described synchronizing signal obtains the first voltage and current, the first phase of comparison first voltage and current and the first phase of the second voltage and current, obtains in-phase signal when the two amplitude-phase is identical.
2. power utility check tester according to claim 1, is characterized in that: described main frame MCU and described wireless sampling thief all adopt ADE7878 to measure chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520018238.7U CN204575835U (en) | 2015-01-12 | 2015-01-12 | A kind of power utility check tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520018238.7U CN204575835U (en) | 2015-01-12 | 2015-01-12 | A kind of power utility check tester |
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| CN204575835U true CN204575835U (en) | 2015-08-19 |
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| CN201520018238.7U Active CN204575835U (en) | 2015-01-12 | 2015-01-12 | A kind of power utility check tester |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535952A (en) * | 2015-01-12 | 2015-04-22 | 郑州万特电气股份有限公司 | Electricity use detection tester and allopatric wireless synchronous waveform sampling method thereof |
| CN107843868A (en) * | 2017-10-13 | 2018-03-27 | 国网河南省电力公司濮阳供电公司 | A kind of power utility check measuring instrument based on wireless synchronization technology |
-
2015
- 2015-01-12 CN CN201520018238.7U patent/CN204575835U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535952A (en) * | 2015-01-12 | 2015-04-22 | 郑州万特电气股份有限公司 | Electricity use detection tester and allopatric wireless synchronous waveform sampling method thereof |
| CN107843868A (en) * | 2017-10-13 | 2018-03-27 | 国网河南省电力公司濮阳供电公司 | A kind of power utility check measuring instrument based on wireless synchronization technology |
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